With the release of W4 data we update W3 datarelease with 20 variables that were erroneously omitted in the original release. We also update the release of the merged W1-W3 data which also had erroneously ommitted variables in the original release. These data are now complete.

Data from the W4 survey are now included, both standalone and in merged file with W1-W4. All documentation is in codebook for W1.